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Dental Material AND Ceramic

João Paulo Mendes Tribst, Amanda Maria de Oliveira Dal Piva, Marcela Moreira Penteado, Alexandre Luiz Souto Borges, Marco Antonio Bottino
The aim of this study was to evaluate stress distribution in an occlusal veneer according to the restorative material, restoration thickness, and cement layer thickness. A tridimensional model of a human maxillary first molar with an occlusal veneer preparation was constructed using a modeling software of finite element analysis. The model was replicated 9 times to evaluate the factors: restoration thickness (0.6, 1.2, and 1.8 mm) and cement layer thickness (100, 200, and 300 μm). Then, each model received different restorative materials (High Translucency Zirconia - [YZHT], Lithium Disilicate - [LD], Zirconia Reinforced Lithium Silicate - [ZLS], Feldspathic - [F], and Hybrid Ceramic - [HC]), totaling forty-five groups...
November 29, 2018: Brazilian Oral Research
Gustavo Vargas Da Silva Salomão, Fernando Toledo Santos, Sergio Allegrini Junior
INTRODUCTION: Implant-supported dentures in esthetic zones pose a great challenge to dental surgeons, since important factors are involved in treatment success, such as positioning of the implants, morphology of soft tissues, dental esthetics, and biomechanics of the prosthetic structure. PRESENTATION OF CASE: This clinical report describes the case of a patient previously subjected to dental surgery for implant placement on tooth #11 and subsequent prosthetic crown placement...
November 27, 2018: International Journal of Surgery Case Reports
Edwin Ruales-Carrera, Madalena Lucia Pinheiro Dias Engler, Paula Vaz, Mutlu Özcan, Claudia Angela Maziero Volpato
OBJECTIVE: Congenital absence of maxillary lateral incisors is a frequent clinical challenge which must be solved by a multidisciplinary approach in order to obtain an esthetic and functional restorative treatment. Noninvasive treatments, that are in accordance with the patients' expectations, should be the first therapeutic alternative. If the deciduous tooth is present, minimally invasive dental extraction followed by immediate dental implant placement and provisional restoration is indicated...
November 29, 2018: Journal of Esthetic and Restorative Dentistry
Konstantinos Tzimas, Maria Tsiafitsa, Paris Gerasimou, Effrosyni Tsitrou
The restoration of endodontically treated teeth (ETT) with more than one cusp missing and thin remaining walls is challenging for the general practitioner. The use of posts combined with full coverage restorations is a well-established approach, yet not following the minimal invasive principles of adhesive dentistry. Endocrowns are indirect monoblock restorations that use the pulp chamber of the ETT for retention. In this study the fabrication of 4 endocrowns and their clinical performance will be discussed...
November 2018: Restorative Dentistry & Endodontics
Dan L Romanyk, Ysidora Torrealba Martinez, Sydney Veldhuis, Nyssa Rae, Yilan Guo, Slobodan Sirovica, Garry J P Fleming, Owen Addison
OBJECTIVE: The fabrication of all-ceramic restorations using Computer Aided Design and Computer Aided Manufacturing (CAD-CAM) most commonly involves subtractive machining which results in strength-limiting, surface and sub-surface damage in the resultant prosthesis. The objective was to explore how clinically relevant machining-process variables, and material variables, affect damage accumulation in lithium silicate glass-ceramics. METHODS: Three commercial lithium silicate glass-ceramics (IPS e...
November 16, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Sean M Bittner, Jason L Guo, Anthony Melchiorri, Antonios G Mikos
The field of tissue engineering has produced new therapies for the repair of damaged tissues and organs, utilizing biomimetic scaffolds that mirror the mechanical and biological properties of host tissue. The emergence of three-dimensional printing (3DP) technologies has enabled the fabrication of highly complex scaffolds which offer a more accurate replication of native tissue properties and architecture than previously possible. Of strong interest to tissue engineers is the construction of multilayered scaffolds that target distinct regions of complex tissues...
October 2018: Materials Today
Yarosalv Y Vodoriz, Iryna Y Marchenko, Marina A Shyndryk, Iryna M Tkachenko
OBJECTIVE: Introduction: Taking into consideration the high prevalence of dental trauma, the issue dental trauma management in the frontal dentition is relevant, considering the principles of biological, economical feasibility and clinical features of each case. The aim: The purpose of this review article is to draw dentists' attention to the high prevalence of uncomplicated fractures of teeth (without pulp chamber exposure) and to highlight the most effective methods for their managment...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
Tomohide Kondo, Futoshi Komine, Junichi Honda, Hiroki Takata, Yuta Moriya
PURPOSE: To determine the effect of veneering material and framework design on fracture loads of implant-supported zirconia molar fixed dental prostheses (FDPs). METHODS: Sixty-six zirconia FDPs were manufactured onto two implants and classified as uniform thickness (UT) or anatomic design (AD). These framework design groups were then further divided into three subgroups (n=11): feldspathic porcelain-veneered zirconia FDPs (PVZ), indirect composite-veneered zirconia FDPs (IVZ), and metal-ceramic FDPs (MC)...
November 13, 2018: Journal of Prosthodontic Research
Juliana K M B Daguano, Mariana T B Milesi, Andrea C D Rodas, Aline F Weber, Jorge E S Sarkis, Marcos A Hortellani, Edgar D Zanotto
Glass-ceramics based on the Li2 O-SiO2 system have been extensively used as restorative dental materials due to their excellent chemical durability, aesthetics, inertness in the buccal environment, and high fracture strength; but they are not bioactive. On the other hand, all known bioactive glasses show ability to bond to bone, teeth and cartilage coupled to osteoconduction and osteoinduction, but their fracture strength and toughness are rather low. The aim of this study is to develop and evaluate the in vitro biocompatibility of a new type of (bioactive and strong) lithia-silica glass-ceramic...
January 1, 2019: Materials Science & Engineering. C, Materials for Biological Applications
Margit-Ann Geibel, Benjamin Gelißen, Anna-Katinka Bracher, Volker Rasche
AIM:  Assessment of the visualization of titanium and ceramic dental implants using various isotropic three-dimensional magnetic resonance imaging (MRI) methods. MATERIALS AND METHODS:  21 dental implants (7 ceramic, 14 titanium) were scanned in vitro with a spatially isotropically resolved three-dimensional gradient echo (FFE), a turbo spin echo (SE) and an ultra-short-echo time (UTE) imaging technique. The resulting absolute volumes of the implants were quantified and the relative error to the theoretical volume was calculated...
November 12, 2018: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
S Madeira, M Gasik, Júlio C M Souza, F S Silva, Bruno Henriques
Conversely to natural teeth, where periodontal ligament (PDL) and pulp works as a damper reducing the effect of the stress on surrounding structures, when natural teeth is lost and replaced or restored the biting forces are directly transmitted to the bone or affect the integrity of the adjacent bottom layers. In this study, damping capacity and dynamic Young's modulus of CoCrMo-porcelain composites for dental restorations were evaluated. Dynamic Young's modulus and damping capacity of materials were assessed by dynamic mechanical analyzes (DMA) at 1 and 10 Hz frequencies, over a temperature ranging (18-60 °C)...
October 1, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Dina G Moussa, Conrado Aparicio
More than two-thirds of the global population suffers from tooth decay, which results in cavities with various levels of lesion severity. Clinical interventions to treat tooth decay range from simple coronal fillings to invasive root canal treatment. Pulp capping is the only available clinical option to maintain the pulp vitality in deep lesions, but irreversible pulp inflammation and re-infection are frequent outcomes for this treatment. When affected pulp involvement is beyond repair, the dentist has to perform endodontic therapy leaving the tooth non-vital and brittle...
October 30, 2018: Journal of Tissue Engineering and Regenerative Medicine
Claudia Angela Maziero Volpato, Mario Rui Cunha Pereira, Filipe Samuel Silva
OBJECTIVE: This review integrates published scientific information about the fluorescence of natural teeth, dental resins and ceramics, and the main methods of analysis and quantification presented in the literature. OVERVIEW: Fluorescence is an emission of light (photons) by a substance that has absorbed light of higher energy. In natural teeth, it is more intense in the dentin than in the enamel and presents a bluish-white color. In dental resins and ceramics, fluorescence is obtained by the incorporation of materials that contain rare-earth luminescence centers (more precisely lanthanide luminescence centers), which allows these artificial materials to simulate natural teeth in a more beautiful and vital-looking way...
September 2018: Journal of Esthetic and Restorative Dentistry
Amélie Karine Jacques Mainjot
OBJECTIVES: To introduce a novel approach for full-mouth rehabilitation of severely worn dentition using polymer-infiltrated ceramic network (PICN) computer-aided-design and manufacturing (CAD-CAM) restorations, without tooth tissue preparation and provisional phase. CLINICAL CONSIDERATIONS: Three patients with generalized tooth wear, suffering from dental pain, masticatory dysfunction, bruxism and neck and back pain, were selected and treated in collaboration with physiotherapists...
October 27, 2018: Journal of Esthetic and Restorative Dentistry
Mariela P Tsanova, Neshka A Manchorova-Veleva, Nonka G Mateva, Snejana Ts Tsanova
BACKGROUND: Dental applications of CAD/CAM concept have been available for almost 30 years. They have allowed dentists to work with novel materials with better properties. One of these materials is zirconia ceramic. AIM: To evaluate prospectively the longevity of CAD/CAM indirect zirconia restorations of severely destroyed vital molars and to study the risk factors associated with restoration failures. MATERIALS AND METHODS: Thirty-two indirect zirconia restorations were made in 19 patients...
September 1, 2018: Folia Medica
Emilija Bajraktarova-Valjakova, Vesna Korunoska-Stevkovska, Biljana Kapusevska, Nikola Gigovski, Cvetanka Bajraktarova-Misevska, Anita Grozdanov
BACKGROUND: The high esthetic expectations from the prosthodontic restorations have directed the qualitative development of the materials towards the all-ceramic materials that are capable of replacing porcelain-fused-to-metal systems. AIM: This article reviews the literature covering the contemporary all-ceramic materials and systems with a focus on the chemical composition and materials' properties; also it provides clinical recommendations for their use. RESULTS: The glass-matrix ceramics and polycrystalline ceramics are presented, as well as recently introduced machinable materials, all-zirconia and resin-matrix ceramics...
September 25, 2018: Open Access Macedonian Journal of Medical Sciences
Irena Sailer, Malin Strasding, Nicola Alberto Valente, Marcel Zwahlen, Shiming Liu, Bjarni Elvar Pjetursson
OBJECTIVES: The aim of the present review was to compare the outcomes, that is, survival and complication rates of zirconia-ceramic and/or monolithic zirconia implant-supported fixed dental prostheses (FDPs) with metal-ceramic FDPs. MATERIALS AND METHODS: An electronic MEDLINE search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective cohort studies and retrospective case series on implant-supported FDPs with a mean follow-up of at least 3 years...
October 2018: Clinical Oral Implants Research
Yu Hao, Xiaoyu Huang, Xuedong Zhou, Mingyun Li, Biao Ren, Xian Peng, Lei Cheng
Oral biofilms attach onto both teeth surfaces and dental material surfaces in oral cavities. In the meantime, oral biofilms are not only the pathogenesis of dental caries and periodontitis, but also secondary caries and peri-implantitis, which would lead to the failure of clinical treatments. The material surfaces exposed to oral conditions can influence pellicle coating, initial bacterial adhesion, and biofilm formation, due to their specific physical and chemical characteristics. To define the effect of physical and chemical characteristics of dental prosthesis and restorative material on oral biofilms, we discuss resin-based composites, glass ionomer cements, amalgams, dental alloys, ceramic, and dental implant material surface properties...
October 14, 2018: International Journal of Molecular Sciences
Stefano Pieralli, Ralf-Joachim Kohal, Kerstin Rabel, Manja von Stein-Lausnitz, Kirstin Vach, Benedikt Christopher Spies
OBJECTIVE: To assess the survival and technical complication rate of partial and full-arch all-ceramic implant-supported fixed dental prostheses (P-FDP/FA-FDP) and supporting implants. MATERIALS AND METHODS: An electronic search through three databases (MEDLINE/Pubmed, Cochrane Library, Embase) was conducted to identify relevant clinical studies with an observation period of at least 12 months, including ≥15 patients. Reconstruction and implant survival rates, technical complications and confounding variables such as processed/installed materials, retention mode and location in the mouth were obtained...
October 2018: Clinical Oral Implants Research
Bjarni Elvar Pjetursson, Cristina Zarauz, Malin Strasding, Irena Sailer, Marcel Zwahlen, Anja Zembic
OBJECTIVES: The objective of this systematic review was to assess the influence of implant-abutment connection and abutment material on the outcome of implant-supported single crowns (SCs) and fixed dental prostheses (FDPs). METHODS: An electronic Medline search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective and retrospective studies with a mean follow-up time of at least 3 years. Patients had to have been examined clinically at the follow-up visit...
October 2018: Clinical Oral Implants Research
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